Ambystoma granulosum

Subgenus: Heterotriton
family: Ambystomatidae

© 2019 Rafael Alejandro Calzada-Arciniega (1 of 5)
Conservation Status (definitions)
IUCN (Red List) Status Critically Endangered (CR)
Other International Status None
National Status None
Regional Status None

Country distribution from AmphibiaWeb's database: Mexico



View distribution map using BerkeleyMapper.

From the IUCN Red List Species Account:


Range Description

This species is known only from a small area on the north-western periphery of Toluca city, central State of Mexico, Mexico, at 3,000m asl.

Habitat and Ecology

This is a metamorphosing species spending most of its time on land in grassland habitat. It breeds in small pools and ponds, both artificial and natural.


There is no information available on the population status of this species.

Population Trend


Major Threats

Introduced predatory fishes are the major threat to this species, but the habitat also has been heavily impacted due to extensive urban and agricultural expansion (leading to the desiccation and pollution of its breeding habitat).

Conservation Actions

It does not occur in any protected area, and the conservation and restoration of its habitats is urgent. It might be possible to breed this species in captivity. A survey is urgently needed to determine the current status of this species. Protected under the category Pr (Special protection) by the Government of Mexico.

Red List Status

Critically Endangered (CR)


Listed as Critically Endangered because its Extent of Occurrence is less than 100 km2, all individuals are in a single sub-population, and there is continuing decline extent and quality of its habitat on the northwestern periphery of Toluca City.

Taxonomic Notes

The species boundaries between this species and both Ambystoma lermaense and A. rivularis require further investigation. However, these three taxa are clearly differentiated from all other Mexican ambystomatids (H.B. Shaffer pers. comm.).


Shaffer, H.B., Flores-Villela, O., Parra-Olea, G. & Wake, D. 2008. Ambystoma granulosum. The IUCN Red List of Threatened Species 2008: e.T59058A11877234. .Downloaded on 16 February 2019


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